<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p><italic>This paper deals with investigation of corrosion resistance</italic><italic>of extruded AZ61 magnesium alloy. A phosphate-permanganate</italic><italic>conversion coating was prepared on the surface of</italic><italic>experimental alloy to improve corrosion resistance. This conversion</italic><italic>coating was prepared as an alternative to the chromating</italic><italic>process which showed great results in the case of magnesium</italic><italic>alloys. Nevertheless, the use of chromates is limited by the</italic><italic>environmental regulations in Europe. The corrosion resistance</italic><italic>of extruded AZ61 magnesium alloy with or without conversion</italic><italic>coating was tested by means of an immersion test. The samples</italic><italic>were immersed in sodium chloride solution (3.5%) with immersion</italic><italic>times of 1, 8, 48 and 168 hours. The weight losses were</italic><italic>measured using an analytical balance (d = 0.1 mg) and expressed</italic><italic>as corrosion rate in [mm.year<sup>-1</sup>]. Microstructure, surface</italic><italic>morphology of conversion coating and corrosion attack were</italic><italic>observed by means of light and scanning electron microscope.</italic></p></abstract>

This paper deals with investigation of corrosion resistanceof extruded AZ61 magnesium alloy. A phosphate-permanganateconversion coating was prepared on the surface ofexperimental alloy to improve corrosion resistance. This conversioncoating was prepared as an alternative to the chromatingprocess which showed great results in the case of magnesiumalloys. Nevertheless, the use of chromates is limited by theenvironmental regulations in Europe. The corrosion resistanceof extruded AZ61 magnesium alloy with or without conversioncoating was tested by means of an immersion test. The sampleswere immersed in sodium chloride solution (3.5%) with immersiontimes of 1, 8, 48 and 168 hours. The weight losses weremeasured using an analytical balance (d = 0.1 mg) and expressedas corrosion rate in [mm.year-1]. Microstructure, surfacemorphology of conversion coating and corrosion attack wereobserved by means of light and scanning electron microscope.

Improvement of corrosion resistance of AZ61 magnesium alloy / Zvýšení korozní odolnosti hořčíkové slitiny AZ61

Materials Research Centre, Brno University of Technology

Institute of Material Science and Technology, Brno University of Technology

KOM – Corrosion and Material Protection Journal

This paper deals with investigation of corrosion resistanceof extruded AZ61 magnesium alloy. A phosphate-permanganateconversion coating was prepared on the...

Improvement of corrosion resistance of AZ61 magnesium alloy / Zvýšení korozní odolnosti hořčíkové slitiny AZ61

Publié en ligne: 17 janv. 2013

Pages: 100 - 103

DOI: https://doi.org/10.2478/v10227-011-0017-4

This content is open access.